Implement typed array constructors.

client/dom/generated/src/frog/Int8Array.dart

Index: client/dom/generated/src/frog/Int8Array.dart
diff --git a/client/dom/generated/src/frog/Int8Array.dart b/client/dom/generated/src/frog/Int8Array.dart
index edb2e569ea9fdd6708d18bfb016f7a2ab439e4ad..cec32afc5dd6cdcb78609feabee2076791da9d9f 100644
--- a/client/dom/generated/src/frog/Int8Array.dart
+++ b/client/dom/generated/src/frog/Int8Array.dart
@@ -1,9 +1,21 @@
 
-class Int8Array extends ArrayBufferView native "*Int8Array" {
+class Int8Array extends ArrayBufferView implements List<int> native "Int8Array" {
+
+  factory Int8Array(int length) =>  _construct(length);
+
+  factory Int8Array.fromList(List<int> list) => _construct(list);
+
+  factory Int8Array.fromBuffer(ArrayBuffer buffer) => _construct(buffer);
+
+  static _construct(arg) native 'return new Int8Array(arg);';
 
   static final int BYTES_PER_ELEMENT = 1;
 
   int length;
 
+  int operator[](int index) native;
+
+  void operator[]=(int index, int value) native;
+
   Int8Array subarray(int start, [int end = null]) native;
 }